Support pypy-3.7

[DorianGray]

Issue description

I would personally love pypy support in qtile.
Tests already pass, but CI has some obstacles in the way

Qtile version

d6f8a6b / master

TODO

• wait on github actions to support pypy-3.7
• wait on tox-gh-actions to support pypy-3.7
• modify workflow and tox.ini to run on pypy-3.7

Relevant links

actions/setup-python#136
ymyzk/tox-gh-actions#49
#2055

[DorianGray]

My PR got merged over on tox-gh-actions, but it might be a bit for a release.

[ramnes]

Cool, thanks! Let's get this done.

[DorianGray]

All set!

[m-col]

Could we get something added to the docs about this too? Perhaps a section about the different Python implementations (is that what pypy is?) that we support? Personally this is something I know very little about, but if there are benefits to be taken advantage of then I'd be interested to know how/why/which!

[DorianGray]

absolutely! As soon as the tests pass, lol

[DorianGray]

Ubuntu/github actions ship pypy3 built against tcl 8.5, not 8.6 like the rest of the pythons. This is the cause of the test failures :/ Looking for a workaround.

[DorianGray]

#2055 is update with all tests passing. I'll write up some docs and add them tomorrow.

[DorianGray]

docs added, also thanks to @m-col their removal of tkinter no need to skip tests depending on if python was built with a recent version of tk \o/

[DorianGray]

Complete =)